The refinery grade, synthetic ester lubricity additive component of PRI-D is verified as the most effective and safest available today based on extensive oil industry research and HFRR lubricity testing.

 PRI-D is a highly effective preventative maintenance tool. The proprietary, refinery-grade chemistry of PRI-D is unsurpassed at preventing carbon deposits and fuel system fouling. Engines remain cleaner and last longer. In addition, the tank slime and sludge that diesel fuel users commonly encounter is eliminated!